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5 Applications for Propylene Glycol

Views: 269     Author: Bella     Publish Time: 2023-09-06      Origin: Site


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5 Applications for Propylene Glycol

Propylene glycol is appropriate for a variety of uses due to its miscibility with water and other solvents. We've discussed this substance in this article; read more about it. If not, let's get started with the five applications for propylene glycol.

1. Safe Antifreeze

Propylene glycol has only recently been used in place of ethylene glycol in a new generation of antifreeze compositions.

This shift occurred because propylene glycol was less hazardous than ethylene glycol, not because it performed better.

When consumed, the very poisonous chemical ethylene glycol transforms into crystals of calcium oxalate. The accumulation of these crystals in the kidneys, lungs, and heart might result in irreversible harm.

Many children and pets have inadvertently consumed ethylene glycol due to its distinct sweet taste and smell. Particularly dangerous situations have occurred when pets ingest antifreeze that contains ethylene glycol after it leaks or spills in the driveway.

Conversely, propylene glycol antifreeze is a safe substitute. This is due to the fact that if it is ingested, it is transformed into two safe substances: pyruvic acid, which is a byproduct of the normal metabolism of glucose, and acetic acid, often known as vinegar.

Similar to ethylene glycol, propylene glycol lowers the freezing point of water by preventing the development of ice crystals, which is why it's used in antifreeze.

2.Food Industry

The fact that PG is used in the food sector, where it functions as a solvent, preservative, and humectant, among other things, is further evidence of its non-toxic nature. The E-number for propylene glycol is E1520.

Propylene glycol's ability to function without interfering with other components is one of the reasons it is used in a variety of food products.

The hygroscopic characteristics of propylene glycol are crucial for its use in food applications. By drawing and retaining both oil- and water-based materials, PG may ensure even dispersion throughout a blend. This implies that it can, for example, disperse food colouring uniformly.

Due to its hygroscopicity and miscibility, PG is a great humectant since it helps preserve the moisture in food, such as baked products. This aids in their preservation as well.

3. Medications

Many topical, injectable, and oral medications contain propylene glycol. It is also employed as a solvent and a medication stabiliser.

Because of its water miscibility, PG can be used as a solvent for medicinal formulations that are intractable. For example, benzodiazepines like propylene glycol's miscible qualities

Similar to this, PG is used during intravenous therapy to facilitate more efficient chemical absorption by the body.

Propylene glycol's toxicity has been questioned, but it's crucial to keep in mind that it dissolves in the body in 48 hours and doesn't crystallise into any dangerous substances. The term "non-bio-accumulative" refers to the fact that it does not accumulate within our bodies.


Propylene glycol finds application not only in the food business as a humectant but also in the cosmetics industry. It functions well in moisturisers and hair care products by drawing in moisture from the air and retaining it there.

By drawing moisture to the skin and hair, PG not only softens them but also inhibits the formation of bacteria and extends the shelf life of cosmetics.

Plant-based PG is becoming more and more popular in cosmetics due to its natural manufacturing. To ensure optimal safety and efficacy, many cosmetic-grade petroleum gels are generated from plants rather than propene, a byproduct of fossil fuels.


E-cigarettes are a safer substitute for traditional cigarettes. They function by heating a liquid-filled nicotine cartridge. As soon as the user starts breathing in, this occurs.

After being transferred from the cartridge to the atomizer, the e-liquid is typically absorbed using cotton. The liquid is subsequently changed into vapour by the heat produced during inhalation, which the person exhales.

The safety of numerous of the compounds used in e-cigarettes has frequently been questioned. Among these compounds is propylene glycol.

A common combination of ingredients found in e-cigarette cartridge liquid is vegetable glycerin and propylene glycol. These are also combined with nicotine and flavours.

Because glycerin is viscous, its use in e-liquid contributes to the thicker vapour clouds. But because of its liquid viscosity, the e-liquid may not go to the atomizer as well as it should. Consequently, a thinner called propylene glycol is added.

Propylene glycol's low density keeps any residue from accumulating inside the atomizer and facilitates easier e-liquid absorption by the cotton.

Similar uses of PG can be seen in smoke or fog devices. Propylene glycol is typically included in the clouds created by artificial smoke used in theatre productions and concerts.

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